Odds of Hanging On
Radiology is intensely competitive and stressful. If you aren't the best of the best, you could end up in Bucharest (that's an old saying we just made up). If you aren't super competitive, you might not get your first choice for job locations and you might find yourself in much more frantic, stressful conditions. The leap from school to work is akin to a trip from the frying pan to the fire. Get ready for lots of ER work, a heavy daily rotation, and a massive work load.
If you're a woman, consider getting a sex change. As you move up the educational and career ladder, the playing field gets pretty manly. If you're a woman who likes a challenge, you're in for a bumpy, but rewarding ride. Women are much more likely to go part-time earlier in their careers to care for children.
Before retiring, many radiologists go part-time or choose to join academia or consulting on a case-by-case basis.